slow moving but can knock down, cover or burn everything in its path.
the weight can cause collapse of buildings, it can clog machinery and suffocate plants, animals and people
loose rocks and soil mix with water, they can bury entire towns
can knock down or burn everything in its path, fast moving and extremely dangerous.
a rapid movement of rock and soil downhill, can cause a tsunami if large enough amounts fall into the ocean
uncommon but devastating, may have caused the destruction of the entire island of Krakatau in Indonesia 1883
Long term negative affects
mudflows may still occur and destroy homes years after an eruption
Long term positive affects
rocks break up into rich soil, build picturesque landscape, make cleaning agents, and provide geothermal energy.
Volcanic ___ are very dangerous and affect the air. In large amounts they are toxic.
Volcanic gases make breathing difficult and damage the ___ of people and animals.
In West Africa, a sudden release of ____ from a volcano at the bottom of a lake killed 1700 people in 1986.
Gases like ______ can mix with water in the air to form acid, which creates acid rain.
decreased average temperature
The 1991 eruption of Mt. Pinatubo released enough sulfur dioxide to form a haze around the planet, blocking the sun which _____ in 1992 and 1993.
A ___ is a type of hot spring where water shoots in the air.
______ form hot springs and geysers where magma is near the surface.
A __ is a hot spring that does not releases water, but instead releases steam and other gases.
Deep sea vents
____ are hot springs that form in cracks of the ocean floor.
The heat and chemicals from deep sea vents provides energy for the foundation of the ____ there.